<template>
  <el-tabs v-model="message" type="card">
    <el-tab-pane :label="`未读消息(${state.unread.length})`" name="first">
      <el-table :data="state.unread" :show-header="false" style="width: 100%">
        <el-table-column>
          <template #default="scope">
            <span class="message-title">{{ scope.row.title }}</span>
          </template>
        </el-table-column>
        <el-table-column prop="date" width="180"></el-table-column>
        <el-table-column width="120">
          <template #default="scope">
            <el-button size="small" @click="handleRead(scope.$index)">标为已读</el-button>
          </template>
        </el-table-column>
      </el-table>
      <div class="handle-row">
        <el-button type="primary">全部标为已读</el-button>
      </div>
    </el-tab-pane>
    <el-tab-pane :label="`已读消息(${state.read.length})`" name="second">
      <template v-if="message === 'second'">
        <el-table :data="state.read" :show-header="false" style="width: 100%">
          <el-table-column>
            <template #default="scope">
              <span class="message-title">{{ scope.row.title }}</span>
            </template>
          </el-table-column>
          <el-table-column prop="date" width="180"></el-table-column>
          <el-table-column width="120">
            <template #default="scope">
              <el-button type="danger" size="small" @click="handleDel(scope.$index)">
                删除
              </el-button>
            </template>
          </el-table-column>
        </el-table>
        <div class="handle-row">
          <el-button type="danger">删除全部</el-button>
        </div>
      </template>
    </el-tab-pane>
    <el-tab-pane :label="`回收站(${state.recycle.length})`" name="third">
      <template v-if="message === 'third'">
        <el-table :data="state.recycle" :show-header="false" style="width: 100%">
          <el-table-column>
            <template #default="scope">
              <span class="message-title">{{ scope.row.title }}</span>
            </template>
          </el-table-column>
          <el-table-column prop="date" width="180"></el-table-column>
          <el-table-column width="120">
            <template #default="scope">
              <el-button size="small" @click="handleRestore(scope.$index)">还原</el-button>
            </template>
          </el-table-column>
        </el-table>
        <div class="handle-row">
          <el-button type="danger">清空回收站</el-button>
        </div>
      </template>
    </el-tab-pane>
  </el-tabs>
</template>

<script setup lang="ts" name="tabs">
import { ref, reactive } from 'vue';

const message = ref('first');
const state = reactive({
  unread: [
    {
      date: '2018-04-19 20:00:00',
      title: '【系统通知】该系统将于今晚凌晨2点到5点进行升级维护',
    },
    {
      date: '2018-04-19 21:00:00',
      title: '今晚12点整发大红包，先到先得',
    },
  ],
  read: [
    {
      date: '2018-04-19 20:00:00',
      title: '【系统通知】该系统将于今晚凌晨2点到5点进行升级维护',
    },
  ],
  recycle: [
    {
      date: '2018-04-19 20:00:00',
      title: '【系统通知】该系统将于今晚凌晨2点到5点进行升级维护',
    },
  ],
});

const handleRead = (index: number) => {
  const item = state.unread.splice(index, 1);
  state.read = item.concat(state.read);
};
const handleDel = (index: number) => {
  const item = state.read.splice(index, 1);
  state.recycle = item.concat(state.recycle);
};
const handleRestore = (index: number) => {
  const item = state.recycle.splice(index, 1);
  state.read = item.concat(state.read);
};
</script>

<style>
.message-title {
  cursor: pointer;
  color: var(--el-color-primary);
}

.handle-row {
  margin-top: 30px;
}
</style>
